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49c132c622
Added volume control feedback during music playback over Bluetooth. Changed volume buttons handler logic in service audio to use actions instead of messages.
25 lines
908 B
C++
25 lines
908 B
C++
// Copyright (c) 2017-2021, Mudita Sp. z.o.o. All rights reserved.
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// For licensing, see https://github.com/mudita/MuditaOS/LICENSE.md
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#include "VolumeScaler.hpp"
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namespace audio::volume::scaler
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{
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Volume toSystemVolume(std::uint8_t avrcpVolume) noexcept
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{
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constexpr auto avrcpMaxVolume = float{0x7F}; // from AVRCP documentation
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const auto systemVolume = (avrcpVolume / avrcpMaxVolume) * audio::maxVolume;
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// prevents conversion to 0 while in fact sound is not muted
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if (systemVolume > 0.01f && systemVolume < 1.0f) {
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return 1;
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}
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return systemVolume;
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}
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std::uint8_t toAvrcpVolume(float systemVolume) noexcept
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{
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constexpr auto avrcpMaxVolume = std::uint8_t{0x7F}; // from AVRCP documentation
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return std::round(systemVolume * avrcpMaxVolume / audio::maxVolume);
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}
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} // namespace audio::volume::scaler
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